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Search: id:A027813
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| 56, 630, 3780, 16170, 55440, 162162, 420420, 990990, 2162160, 4424420, 8576568, 15872220, 28217280, 48430620, 80582040, 130423524, 205931880, 317983050, 481180700, 714864150, 1044323280, 1502250750, 2130464700
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OFFSET
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0,1
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FORMULA
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Number of 14-subsequences of [ 1, n ] with just 5 contiguous pairs; g.f. 14*(4+5x)/(1-x)^10
C(n+4, 4)*C(n+8, 5) - Zerinvary Lajos (zlaja(AT)freemail.hu), May 26 2005
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CROSSREFS
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Sequence in context: A005931 A027793 A055747 this_sequence A136006 A138410 A105940
Adjacent sequences: A027810 A027811 A027812 this_sequence A027814 A027815 A027816
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KEYWORD
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nonn
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AUTHOR
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thi ngoc dinh (via rkg(AT)cpsc.ucalgary.ca)
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